Spinning machine



May 12, 1925. 1,537,111

c. H. FORSAITH SPINNING MACHINE Filed April 26, 1923 2 Sheets-Sheet 1 mmnu mm VENTOR W ATTORNEY May 12, 1925. 1,531,111 C. H. FORSAITH SPIN NH IG KACHINI Filed April 26, 1923 2 Sheets-Shoot 2.

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W ATTOR NEY Patented May 12, 1925.

v UNITED STATES re ain PATENT QFFICE. I

CHARLES H. FG'ESAITH, OF NA SHUA.-,'NEW HAMPSHIRE, ASSIGNOR TO SACO-LOWELL SHOPS, OF BOSTON, IMASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

SPINNING MACHINE.

Application filed April 26, 1923. Serial No. 634,759.

tain new and useful Improvements in Spin-.

ning Machines, of whichthe following is a specification.

This invention relates to spinning frames and similar machines which are used in the winding of bobbins and llke thread packages.

The invention is especially concerned with machines of thistype equipped to produce what is known as filling wound thread F packages.

It is the usual practice to fill bobbins on a. ring spinning frame, such a machine being equipped with a mechanism known as a. builder motion i which a controls the movement of the ring rail.

such that the rail rises gradually with a reciprocating motion until, when the filling of the bobbins has been completed, the rail is at the top of its traverse. These machines often are equipped also with mechanism which automatically stops the machine when the filling of the bobbins has been completed, this mechanism being known commercially as a full bobbin stop motion.

limit of its traverse and the machine has been stopped automatically, it is the usual practice nextto wind down the ring rail preparatory to dotting. This operation consists simply in turning a' crankfion the builder motion in such a directioi'i as to move the ring rail from the top to the bot tom of the traverse. Before winding down the rail, the machine tender usually starts the machine running again so that the end of the yarn or thread is wound in a helix down over the outer surface of each bobbin and around the base of the bobbinfor a few turns. As soon as the winding down operation has been completed, the attendant stops the machine again and removes or dofis the full bobbins from the spindles and replaces them with empty bobbins.

This particular method of winding down is of advantage in that it produces athread package better adapted to withstand rough handling, since it is less likely to unravel, and this package also is moreconvenient to use because the end of the yarn or thread can The action is 1 After the ring rail has reached the upper.

. corned easily-be found. The process, however, is open to the objection that the number of turns wound around the baseof eachbobbin oftenbecomes excessive due to the fact that the machine runs at a highspeed, and the number of turns that will be wound on a bobbin depends upon the time which the attendant takes in stopping the frame after the ring rail has been wound down. An excessive quantity of yarn wound ont'he base of a bobbin is objectionable because it in volves a waste of yarn and a loss of time in unwinding this yarn when the bobbin later is placed in a shuttle or in the carrier or magazine of an automatic loom.

The present invention aims to improve machines of the character above designated with a View to preventing the excessive winding of yarn around the bobbin bases, and facilitating the winding down operation. To this end it is an object of the invention to devise a simple and reliable mechanism for automatically stopping the machine when the winding down operationhas been completed. p

The nature of the invention will be readily understood from the following description when read in connection with the accompanying drawings, and the novel features will be particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a side elevation showing those parts of a spinning machine with which the present invention is more particularly con- Fig. 2 is a vertical, transverse, cross sec- -tional view on the line 2-2, Fig. 1;

Fig. 3 is a side elevation, partly'in cross section, showing a ratchet lever and latch which form part of the mechanism shown in Figs. 1 and 2.; and

4 is a side elevation showing a full bobbin with the thread wound thereon, as above described.

In the construction shown, the ring rail is designated at 2 and certain of the bobbins in the process of being filled or wound are shown at 3. A rod 4, Fig. 1, connects the rail 2 with an arm 11 which is secured fast on a crossshaft 6 that extends from one side to the other of the machine, as best shown in Fig. 2. A counter-weight lever 5 is secured fast to the rock shaft 6 and an arm 7 fast on the shaft 6 is connected by means of a chain 8 running over a pulley 9 to the usual builder motion 10.

The machine is arranged to be belt driven through fast and loose pulleys 12 and 13, respectively, and the driving belt is control ed by a fork 14: fast on the end of a rod 15 which is mounted to slide hori'liontally in the frame of the machine. hen the machine is running, the fork is held in the position shown in 1 by means of a latch 16 which extends through a hole in a hanger or bracket 17, and has a book 18 to engage the bracket. The latch 16 is pivoted to a slide 19 which is mounted on the rod 15, and a spring 20 acts on this slide in a direction tending to move it toward the right, Fig. 1. A collar 22 is adjustably mounted on the rod 15 and, when the machine is running, is in the position-shown in 1 against the end of the slide 19. l 'ivotally connected to the free end of the latch 16 is a vertical rod 241- which carries an adjustable collar 25 and extends through a hole formed in a lever 31" which is secured to the rock shaft (3.

As the thread body is gradually built up on the bobbins, the chain or cord 8 is slowly unwound thus allowing the counter-weighted lever 5 to turn the rock shaft 6 in a clock wise direction. referring to Fig. 1. The collar 25 is so adjusted that asthe filling of the bobbins is being completed this collar is engaged by the lever and lifted, thus re leasing the latch 16 from the bracket 1?.

The spring 20 imn'iediately pulls the slide 19 toward the right Fi 1, carr'in r the rod 153 with it, and thus moving the fork 1 1 to shift the belt from the fast pulley 12 on to the loose pulley 13. This stops the machine.

The mechanism so far described is substantially like that used heretofore, the full bobbin stop motion being substantially like that shown and described in Patent No. 777.918. granted Dec. 20, 190-1. Reference should be made to this patent. for a more complete description of the construction and operation of this mechanism.

.riccording to the present invention, a knee-joint lever is pivoted on a hanger or bracket 28 located closely beside the bracket 17. This lever, as best shown in Figs. 2 and 3, comprises two parts 29 and 30, respectively. both mounted on the fixed pivot 31 and connected together by a coiled spring 32. It will be obvious from an inspection of Fig. 3 that the parts 29 and are connected by a knee-joint which permits them to swing out of alinement only by a relative pivotal movement in one direction. A link connects the lever arm 29 with the lever 11.

At the beginning of the bobbin filling operation the arm 29 of the knee-joint lever is in the dotted line position shown in Fig. 3,

while the arm 30 is in approximately the full line position shown in Fig. 3. As the building of the bobbins progresses the link 33 is raised, due to the turning of the rock shaft (3 in a clockwise direction, and just before the machine is automatically stopped by the full bobbin stop motion, the arm 29 is in approximately the position shown in full lines, Fig. 3, While the part 30 is still held in its original position by its contact with the side of the latch 16. lVhen the latch 16 is lifted, as previously described, the lever arm 30 snaps under it into a straightened relationship to the arm 25), as shown in dotted lines, Fig. 3.

When the machine is automatically stopped by the full bobbin stop motion at the completion of the filling of the bobbins. the machine attendant next shifts the fork 14 manually to start the machine into operation again, thus reengaging the hook 153 of the latch 16v with the bracket 17, as shown in Fig, 1. The attendant immediately begins to turn the crank 35 on the builder motion 10 to wind down the rail 2, and as the rail nears the lower limit of its traverse, the end of the arm 30 engages the latch 16 and begins to lift: it due to the transmission of motion from the builder mechanism through the rock shaft 6 and link 33 to the lever 29-30. The latch preferably is released at such a point in the winding down process that the momentum of the machine will complete the operation. The machine stops when the desired length of thread has been wound on the base of each bobbin. The lever 2930 and latch 16 are so designed and located that when the final trip-oft occurs the tip of the lever arm 30 slips from. under the edge of the latch so that when the machine is started again after dofling the latch and lover re sume their original positions with the tip of the part 30 resting against the side of the latch, as shown in Fig. 3.

The stopping of the machine as just described results in winding the thread heli cally round the outside of each bobbin. 3, a indicated at T, 4:, and in winding a very few turns of thread around the base of the bobbin. As soon as the machine has been stopped the second time the attendant immediately proceeds with the dotting operation.

It will now be appreciated that this invention provides a rery simple mechanism for automatically stopping the machine at substantially the completion of the winding down operation. In order that. the point at which the machine is tripped may be adjusted, the link 332% is preferably made in two parts which are connected by a turn lmckle 36. The machine attendant thus is relieved of the duty of stopping the machine the second time, and the variations in the quantity of yarn wound on the base of the bobbin.

which heretofore has been a matter solely within the discretion of the attendant, is so reduced as to be ncgl able for all practical mrposes. The duties of the attendant thus are simplified and a more satisiz'ictory yarn" package is made.

A further advantage of this mechanism s that it can be a i )lied ver I easil v to existin l m ranged to be brought into operation by the winding down the ring rail for automatically stopping the machine,

2. In a spinning machine, the combination with an automatic full bobbin stop motion, of mechanism operative through said stop motion to stop the machine after it has been started again to ei'lect the winding down of the ring rail.

3. In a spinning machine, the combination o'l mechanism for stopping the machine, and means for bringing said. mechanism into operation substantially when the ring rail of the machine reaches either the top or bottom of its traverse.-

4t; In a spinning machine, the combination with. a full bobbin stop motion including a latch normally restraining the movement of the parts through which the stopping of the machine is effected, and mechanism for releasing said latch when the filling of the bobbins has been substantially completed, of additional mechanism operative after the latch has been re-set for the wind down operation to release it automatically at substantially a predetermined point in the movement of said rail as it is wound down.

5. In a spinning machine, the combination with a full bobbin stop motion including a latch normally restraining the movement of the parts through which the stopping'o'f the machine is e'li'ected, and mechanism for re .leasil'lg said latch when the filling of the bobbins has been substantially completed, of a builder motion, and mechanism connected with said motion'and operative automatically after the latch has been re-set for the wind down operation to release it at a substantially predetermined point in the movement of the ring rail as said rail is wound down. r

6. In a spinning machine, the combination with a full bobbin stop motion including a latch normallyrestraining the movement of the parts through which the stopping of the machine is effected, and mechanism for releasing said latch when the filling of the bobbins has been substantially completed, of additional mechanism operative after the latch has been re-set for the wind down operation to release it automatically at substantially a predetermined point in the movement of saidrail as it is wound down,

and means whereby said point maybe ad justed. i r

7. In a spinning machine, the combination with a full bobbin stop motion including a latch normally restraining the movement of the parts through which the. stopping of the machine is effected, and mechanism for releasing said latch when the filling of the bobbins has been substantially completed, of a builder motion, a shaft connected with said builder motion and arranged to be rocked thereby as the filling of the bobbins progresses, and connections between said shaft and said latch operative after the latch has been reset for the wind down operation to release it automatically at substantially a predetermined point in the movement of the ring rail as it is wound down.

8. In a spinning machine, the combination with mechanism for stopping the machine including a latch normally restraining the movement of the parts through which the stopping of the machine is effected, of means including a knee-joint lever for engaging said latch and automatically tripping it under predetermined conditions.

9. In a spinning machine, the combination with a full bobbin stop motion including a latch normally restraining the movement of the parts through which the stopping of the machine is eflected, and mechanism for releasing said latch when the filling of the bobbins has been substantially completed, of a builder motion, a shaft connected, with said builder motion and arranged to be rocked thereby as the filling of the bobbins progresses, a knee-joint lever connected with said shaft to be moved thereby and operative after the latch has been reset to release said latch during its movement past the latch in one direction, but inoperative to move the latch during its movement past the latch in the opposite direction.

10. In a spinning machine, the COIIIblIIH" tion of a stop motion including a latch normally restraining the movement of parts which effect the stopping of themac-hine, a builder motion, connections arranged to be operated by said builder motion to release said latch when the ring rail of the machine reaches substantially the upper limit of its traverse, and additional connections arranged to be operated by thewinding down of said ring rail to release said latch after it has been reset for the wind down operation.

11. In a spinning machine, the combination of a stop motion including a latch normally restraining the movement of parts said builder motion to be rocked thereby in one direction as the building of the thread bodies progresses, connections between said shaft and latch for releasing the latclrwhen the filling of the bobbins has been substan+ tially completed, a knee-joint lever connected with said rock shaft and arranged to'be moved idly past said latch when the shaft is rocked in said direction but arranged to release said latch after it has been re-set 10 and during the subsequent rocking of said shaft in the opposite direction.

CHARLES H. FORSAITH. 

